[FFmpeg-user] How can I extract 8 linear thumbnails from videos with differnt length?

[Christoph Gerstbauer]

> Depending on the calculation it may be easier/more intuitive to
> use framerate:
>
> ffmpeg -i input -filter:v framerate=1/10 out-%d.jpg
>
> will create one image every ten secs.
>
Hi

I dont need every x seconds one image ;)
I need it like (dirty example) at youporn.
Every videos (not depending which filelength) has exact 9 thumbnails. 
Linear division over the length.
So the 5th thumbnail is in the middle of the video.

Best Regards
Chris